HP Smart Array P800 Controller - Manual (Page 23)

Upgrading or replacing controller options 23
9. Pull the right hand portion of the battery case away from the battery pack and simultaneously rotate
the battery out of the opening.
10. Position the replacement battery pack in the opening in the battery case as shown. The upper left
edge of the battery is under the flanges on the pillars at the left edge of the opening, and the right
side of the battery rests on the right pillars.